forgetfulness

Vitamin B-12 – also called cobalamin, is a water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood.
Pernicious Anemia, which is an autoimmune disease, lack of intrinsic factor in the stomach to make Vitamin B12.
Increasing intake of Vitamin B12 may help elderly individuals by protecting against brain atrophy or shrinkage associated with Alzheimer’s disease and impaired cognitive function.
Vitamin B12 deficiency can potentially cause severe and irreversible damage, especially to the brain and nervous system. At levels only slightly lower than normal, a range of symptoms such as fatigue, depression, and poor memory may be experienced. Vitamin B12 deficiency can also cause symptoms of mania and psychosis.

Folic Acid – also known as folate – The human body needs folate to synthesize DNA, repair DNA. It is especially important in aiding rapid cell division and growth, such as in infancy and pregnancy. Children and adults both require folic acid to produce healthy red blood cells and prevent anemia.
Common symptoms of folate deficiency include diarrhea, macrocytic anemia with weakness or shortness of breath, nerve damage with weakness and limb numbness (peripheral neuropathy), pregnancy complications, mental confusion, forgetfulness or other cognitive declines, mental depression, sore or swollen tongue, peptic or mouth ulcers, headaches, heart palpitations, irritability, and behavioral disorders. Low levels of folate can also lead to homocysteine accumulation. DNA synthesis and repair are impaired and this could lead to cancer development.